The Supply Department.
Page 19
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Selected Information which is likely to be of Interest to Makers, Owners, and their Buyers.
Of Interest to Draughtsmen.
Wo recently received from Wm. J. Brooks and Co., of Letchworth. Herts., samples of several useful contrivances which ehpuld appeal to any of our readers who, from time to time, have to make use of a drawing-hoard. These specialities have been practically tested, as is our custom, by a member of the staff of this journal, and we now have pleasure in advising those who are interested to write to the above-named makers, who, by-theway, are engineers, and to obtain
from them full printed particulars of these new drawing-office requisites. We were principally interested in the Brooks patent T-square lock, Many of us have experienced the annoyance of finding, after considerable drawing has been done, that the T-square has not been properly butted against the edge of the board. The drawing, which we reproduce on this page, renders a detailed description of the Brooks attachment unnecessary. By the use of the lock. although the T-square may still be moved freely over the hoard, the hands may be removed from the former without fear of its shifting its position. This device appears to provide all the convenience of a vertical board at a fraction of its cost ; it can be applied to any T-square. Others of Brooks's patented specialities include : various ingenious forms
of adjustable curves; a neat little circular corner curve which compactly embodies 11 or 12 suitably-radiused corners ; and several neat devices for taking the place of the " common or garden " drawing pin.
A New Composite Wheel.
In the article on tires and wheels, which was included in our Royal Show issue of last week, we stated that we had been placed in possession of particulars of an entirely-new type of composite wheel, which has been produced by the K.T. New -Pneumatic Tyre and Rubber Co., Ltd. We understand that Mr. Killen, of that company, is responsible for the design of this new model, of which we reproduce herewith various line drawings. Most of our readers are familiar with the several successful patterns of composite road wheels which are already in use. It will be seen from the drawings to which we have referred that this new design consists essentially of two specially-shaped cold-pressed steel members, between which are wedged suitably-shaped wooden felloe and centre pieces. There is no welding whatever throughout the metal portion of the wheel, but flue two discs are fastened together by means of a series of short bolts on the rim. Other rows of bolts are employed to keep the wooden centre pieces tight between the two discs. The general arrangement of the parts is quite evident from our illustration, and it is, perhaps, unnecessary to say more on the subject of this construction than to point out that both plates are purposely buckled in order to provide a certain amount of spring in the metal part of the structure. It is claimed that this new design possesses all the advantages of
both a wooden wheel and a steel wheel, and none of the disadvantages of either. The " K.T." people state that it can be produced at it much-less cost than either a wooden or a steel wheel; it will, therefore. have an additional " pull " over other of the accepted types. Additional advantages which are put forward in favour of this new model are that, since it is practically indestructible and can be put together without the employment of skilled labour, it is exceptionally suitable for use in the Colonies and abroad.
A Speciality from Brown Bros.
We have already referred in these columns to a form of safety lighter which has been placed upon the market by Brown Bros., Ltd., of 2234. Great Eastern Street, E.C. It will perhaps be remembered that we suggested that this ingenious little device might. be used with advantage for the lighting of acetylene and gas lamps. In order to convey to our readers a clearer idea of the construe tion of this little invention, we have reproduced on this page a photographs showing the Hardre device as it should be held when in operation. The lighter is of sufficient length to reach inside any ordinary lamp. Those who have struggled with wooden matches in a wind will appreciate this point.